<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
    var num = [1,2,4,3,5];
    var target = 6;
   
    
//     var twoSum = function(num, target) {
//      var arr = [];
    
//     for(var i = 0;i<num.length;i++){
//         for(var j =i+1;j<num.length;j++){
//             if(num[i]+num[j]==target){
//                 arr.push(i,j);    
//                 break;
//             }
          
//         }
//     }
//     return arr;
// };

// var res=twoSum(num,target)
// console.log(res);
    var arr = []
    var res = []
    for(var i=0;i<num.length;i++){
        for(var j = i+1;j<num.length;j++){
            if(num[i]+num[j]==target){
                arr.push(res = [i,j]) 
                
                break
            }
        }
    }
   console.log(arr)
    </script>
</body>
</html>